Non-alloy structural steels
| According to SR EN 10025-2/2004 | According to STAS 500/2 | Strength properties | ||
|---|---|---|---|---|
| Alphanumeric designation | Numeric designation | Yield strength σ02 [MPa] | Ultimate tensile strength σr [MPa] | |
| S235JR | 1.0038 | OL37-2k | 220…240 | 380…440 |
| S235JO | 1.0114 | OL37-3k; OL37-3kf | ||
| S235J2 | 1.0117 | OL37-4kf | ||
| S235J2+N | 1.0117 | OL37-4kf normalised | ||
| S275JR | 1.0044 | OL44-2k | 260…290 | 420…520 |
| S275JO | 1.0143 | OL44-3k; OL44-3kf | ||
| S275J2 | 1.0145 | OL44-4kf | ||
| SR275J2+N | 1.0145 | OL44-4kf normalised | ||
| E295 | 1.0150 | OL50 | 280…300 | 480…580 |
| S355JR | 1.0045 | OL52-2k | 320…380 | 500…620 |
| S355JO | 1.0553 | OL52-3k; OL52-3kf | ||
| S355J2 | 1.0577 | OL52-4kf | ||
| S355J2+N | 1.0577 | OL52-4kf normalised | ||
| E335 | 1.0060 | OL60 | 300…380 | 580…700 |
| E360 | 1.0070 | OL60 | ||
Quenching-and-tempering steels (quenching and high tempering)
| According to SR EN 10025-2/2004 | According to STAS 500/2 | |
|---|---|---|
| Alphanumeric designation | Numeric designation | |
| 1C45 | 1.0503 | OLC45 |
| 2C45 | 1.1191 | OLC45S |
| 3C45 | 1.1201 | OLC45XS |
| 25CrMo4 | 1.7218 | 26MoCr11 |
| 34CrMo4 | 1.7220 | 34MoCr11 |
| 30CrNiMo8 | 1.6580 | 30MoCrNi20 |
| 34CrNiMo6 | 1.6582 | 34MoCrNi16 |
| 41Cr4 | 1.7035 | 40Cr10X |
| 42CrMo4 | 1.7225 | 42MoCr11 |
| 42CrMoS4 | 1.7227 | 42MoCr11S |
Note. The mechanical properties are set by the heat treatment; as a guide, hardnesses of (250…400) HB, yield strengths σ02 = (250…800) MPa and ultimate tensile strengths σr = (400…1100) MPa can be obtained.
Case-hardening steels (carburising, quenching and low tempering)
| According to SR EN 10025-2/2004 | According to STAS 500/2 | |
|---|---|---|
| Alphanumeric designation | Numeric designation | |
| C10E | 1.1121 | OLC10X |
| C15E | 1.1141 | OLC15X |
| 16MnCr5 | 1.7131 | 17MnCr10; 18MnCr11 |
| 16MnCrS5 | 1.7139 | 17MnCr10S; 18MnCr11S |
| 20MnCr5 | 1.7147 | 20MnCr12 |
| 17CrNi6-6 | 1.5918 | 17CrNi16 |
| 20MnCrS5 | 1.7149 | 20MnCr12S |
| 18CrNiMo7-6 | 1.6587 | 17CrNiMo6 |
| 20NiCrMoS6-4 | 1.6571 | 20MoCrNi06 |
Note. The mechanical properties are set by the heat treatment; as a guide, hardnesses of (45…65) HRC, yield strengths σ02 = (300…1000) MPa and ultimate tensile strengths σr = (500…1500) MPa can be obtained.
Special alloy steels
| Type | Designation | Use |
|---|---|---|
| Spring steels (EN 10089) | C65A, C75A, C45A, 46Si7A; 56Si7A; 60Si15A; 56Si15A; 51Si15A; 51VCr11A | Elastic elements (springs) |
| Bearing steels (SR EN 683-17) | 100Cr6; 100CrMnSi6-4 (RUL 1, RUL 2) | Rolling-bearing elements |
Note. For spring steels, the mechanical (elastic) properties are set by the heat treatment; as a guide, ultimate tensile strengths σr = (1200…2000) MPa can be obtained.